Honestly, compared to Hate'Zel (let's be honest, she hates everything you do unless you want to kill everything, then she's happy) and EdgeLordHeart (she's pretty much a tiny bit nicer Lae who's not as blood thirsty) - Astarion feels like an angel, a very selfish angel but still. In my optinion Lae is unreasonably aggressive, but then again, she's a githyanki, they tend to be very single minded and ... quite ignorant to the art of persuasion. Hell, Lae really reminds me of all the githyanki you meet in Neverwinter Nights 2... 'All hail the lich queen!', 'You say a bad word about my lich queen, you DIE!!!' and all that good stuff. At least you can keep Lae in line... more or less. For now anyway. I just finished my EA with a seldarine drow cleric of Eilistraee, so I didn't really take Shadowheart along, nor did I bring Wyll, for sure I will never take Lae with me ever again unless I plan to roleplay a super evil douche who lacks braincells to engage in conversations, y'know, kill-on-sight kind of person.
I have to say, I generally play the goody-two-shoe types and I did take Astarion with me, and... he sorta grew on me. A+ voice acting. He really reminds me of another romancable character (and one of my favorites of all time) from NWN2, Mask of the Betrayer, Gann, now I wonder where Astarion's romance will go. Will he have as much depth as Gann had? Will he actually fall in love with our characters or is he just gonna use us as portable blood supply and pleasure 'slaves' for as long as he can and then stab us in the back? Now Gann was an extremely self-obsessed narcissistic douche bag (when you first met him), but as the game progressed, when you actually got to know him, there were certain cracks in this image he was portraying. And in the end, Gann changed, learned to value someone else over himself, regardless of whichever path was taken, good, evil or neutral. Overall real good stuff.
Anyway, 'tis time to give Shadow and Wyll a good go with a wizard, er, mage I'm planning to create... my fav D&D class being sorcerer so, gotta learn all the spells available a bit better before I get my beloved sorc back!